CN1135757C - Multiplex transmission apparatus, multiplex transmission networks, and operation method therefor - Google Patents
Multiplex transmission apparatus, multiplex transmission networks, and operation method therefor Download PDFInfo
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- CN1135757C CN1135757C CNB971148686A CN97114868A CN1135757C CN 1135757 C CN1135757 C CN 1135757C CN B971148686 A CNB971148686 A CN B971148686A CN 97114868 A CN97114868 A CN 97114868A CN 1135757 C CN1135757 C CN 1135757C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1611—Synchronous digital hierarchy [SDH] or SONET
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0478—Provisions for broadband connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0057—Operations, administration and maintenance [OAM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
Abstract
In a synchronous multiplex network including a plurality of multiplex transmission apparatuses, an overhead is passed through intervening multiplex transmission apparatuses. The multiplex transmission apparatus comprises an overhead passing processing circuit composed of a circuit for extracting predetermined administration and maintenance operation information from the received multiplexed signal, a crossconnecting circuit for crossconnecting information extracted by the extraction circuit stage, and an insertion circuit for inserting an output of the crossconnecting circuit into a predetermined location in the overhead of the multiplexed signal to be transmitted.
Description
The present invention relates to digital transmission unit and the structure of utilizing the communication network of this digital transmission unit, particularly relate to structure and the structure of utilizing the communication network of multiplex transmission apparatus for the transmitting device that in a kind of synchronous digital staging hierarchy, uses.
In present digital transport network, a kind of like this degree that simultaneous techniques has developed, promptly communication network with utilize the faster transmission network of optical communication synchronous.For the function and the structure of digital transport network and transmitting device, worldwide standard is established, so that can adopt transmitting device and/or the communication network that meets this standard, so that provide this high quality transmission Anywhere in the world.The example of special-purpose standard can comprise the standard (setting up in 1988) about the transmission system that is called " SDH " (synchronous digital staging hierarchy), this standard is by G.707 definition such as number suggestion of International Telecommunications Union's (after this being called " ITU-T "), with standard (setting up) in 1991 about the transmission system that is called " SONET " (synchronizable optical transmission network), this standard is by American National Standards Institute's (after this being called " ANSI ") number standard definition T.105, these two standard definitions the structure of phototiming communication system and the function of transmitting device.
SDH and SONET have defined the processing (transmission, multiplexed/multichannel are decomposed) of synchronous multiplex signal (frame), this synchronous multiplex signal comprises main signal part that is called " pay(useful) load " and the signal that is called " expense ", digitized main signal is by multiplexed in the main signal part, expense is added in this pay(useful) load, for use in the operation that administers and maintains of transmitting device and communication network.This expense comprises designator, this designator is used to carry out picture frame Phase synchronization and the such insertion control of frequency adjustment, so that a kind of transmission system is provided, this transmission system have than conventional digital synchronous transmitting device still less transmission delay and Geng Gao administer and maintain operating characteristics.The expense that is added on this frame is classified into section overhead (SOH) and line expense (LOH).Section overhead be used to each transmission intercal between transmitting device and regenerative repeater administer and maintain operation (section of being defined as), and this expense is produced, is transmitted by transmission intercal in a device (comprising a regenerative repeater) and on next device by termination.The line expense is used to administering and maintaining operation (being defined as line) what handle each transmission intercal between the transmitting device of multiplex signal.This line expense produced in a transmitting device, by transmission intercal and regenerative repeater be sent out and on next multiplex machine by termination.The transmitting device that adopts above-mentioned SDH or SONET and the example of net have been described in JP-A-4-79628 and JP-A-5-114892.
In the transmission network that meets SDH or SONET, multiplexer can at random be interconnected by regenerative repeater on transmission line.In order to manage and attended operation between the multiplexer in such transmission network, the line expense is used to transmission and receiving management and needed data of attended operation and speech signal between multiplexer.For example, the E-byte that is called the D-byte of " data communication channel " and is called " interconnection " of line expense is used to transmit and be received in this data and the speech signal between the multiplexer.Specifically, when the multiplexer on transmitter side is inserted into data and language message on the E2-byte of D4-D12 byte and line expense and is inserted into the line expense on the transmission line, the line expense by transmission line and regenerative repeater on the multiplexer of destination by termination, between multiplexer, manage thus and attended operation.
Along with the increase of customer volume in transmission network or along with transmit the semaphore that increases by transmission network, can expand and/or improve transmission network, additional multiplexer for example is installed, and transmission line substitutes this transmission network with utilizing faster, so that support user and the increase that transmits semaphore.For example, if transmission quantity increases, so existing transmission network is reconfigured, wherein be additionally provided in the transmission network with the similar multiplexer of the multiplexer of present use, and, processing signals substitutes regenerative repeater so that improve this transmission network, so that connect multiplexer by the quick transmission line in transmission network for having adopted a plurality of faster and more massive multiplexers.
Yet, aforesaid transmission network reconfigure the problem that has caused relating to SDH and SONET.Specifically, since the line expense according to SDH and sonet standard on each transmitter by termination, so can be by termination on the additional quick multiplexer of installing from the expense of existing multiplexer output, so that this expense can not be sent on the far-end multiplexer, this far-end multiplexer does not also receive this expense at present.In other words, reconfigure and caused lacking the operation of before reconfiguring, between multiplexer, carrying out in advance that administers and maintains.Therefore, by when reconfiguring transmission network and improve the transmittability of the transmission network that is used to transmit main signal, reconfigure to make and produced variation in the operational capacity, for example, lacked the operation of between transmitting device, carrying out at present that administers and maintains administering and maintaining of transmission network.Because the previous operation information that administers and maintains that is provided with no longer is suitable for being exclusively used in the tradesman who safeguards transmission network, so the tradesman suffers quite disadvantageous situation.
An object of the present invention is to prevent reconfiguring owing to aforesaid transmission network in the variation that administers and maintains on the operational capacity, a kind of transmitting device and a kind of transmission network with the operational capacity of administering and maintaining particularly are provided, and this administers and maintains operational capacity and is not subjected to the influence of any change of transmission network or can manages more flexible and more expeditiously and attended operation in a simple structure.
Or rather, the invention provides a kind of transmitting device, this transmitting device has the function that replaces processing to be transmitted by the expense of SDH and sonet standardization by an expense.The present invention also provides a kind of transmission network, this transmission network is flexibly and administering and maintaining aspect the operating characteristics to be superior, wherein this transmission network is utilized aforesaid transmitting device, so that the arbitrarily transmitting device of permission in this transmission network transmits and be received in any expense between them.The present invention also provides a kind of method of operating the configuration of this transmission network.
In aspect more detailed, the present invention is provided at circuit and the device that uses in the digital transmission unit with simple structure, so that the branch road expense that receives of interconnection and cross-coupled expense sent to the far-end transmitting device selectively.The present invention also consider branch road expense electricity contain only can not be decoded on the device of far-end destination by the intervention device transport overhead information, with circuit that the invention provides simple structure and device, so that the branch road expense is converted to the information that can be utilized by far-end destination device, and the information of this conversion is sent to far-end destination device.Particularly, the invention provides simple circuit and device, be used for the quantity of notification transmission mistake exactly, though quantity that also can the notification transmission mistake in the branch road that transmits and receive expense, so that can carry out the management of transmission quality.
In addition, the invention provides a kind of method, selectively interconnection expense of this method and between the multiplexer of selecting, transmit and receive cross-coupled expense, and a kind of the detection and the method for the error of transmission that notice produces in branch road.
In order to address the above problem, a kind of multiplex transmission apparatus according to the present invention receives multiplexed tributary signal, this signal comprises having therein by the pay(useful) load of multiplexed a plurality of main signals and the overhead byte that comprises a plurality of maintenance informations relevant with administering and maintaining operation, be terminated and handle and transmission process is carried out in pay(useful) load administering and maintaining operation information, after this multiplexed tributary signal is transformed into multiplexed high speed signal, this multiplexed high speed signal comprises pay(useful) load and a plurality of operation information that administers and maintains, and described pay(useful) load has the main signal that is treated for transmission and transmits this multiplexed high speed signal.This multiplex transmission apparatus comprises a circuit or a device, be used for from a plurality of maintenance informations of the multiplexed tributary signal that is included in reception, selecting predetermined maintenance information, in overhead byte in the multiplexed high speed signal that this predetermined maintenance information is inserted on the high speed transmitter side, thus by the predetermined maintenance information of multiplex transmission apparatus transmission.
Specifically, multiplex transmission apparatus comprises overhead transmission circuit or the transmitting device that is used for transmission maintenance information, this transmission circuit or transmitting device comprise: extract circuit or extraction element, be used for from a plurality of maintenance informations of the multiplexed tributary signal that is included in reception, extracting predetermined maintenance information and insert circuit or insert device, be used for the maintenance information of this extraction is inserted into the precalculated position of the overhead byte of multiplexed high speed signal to be transmitted.This overhead transmission circuit or device can additionally be provided with cross over circuit or cross connection device, are used for the maintenance information that interconnection is extracted.
Similarly, multiplex transmission apparatus receives a plurality of multiplexed tributary signals, each signal comprises pay(useful) load and overhead byte, this overhead byte comprises a plurality of maintenance informations relevant with administering and maintaining operation, a plurality of maintenance informations are terminated handle and multiplexed a plurality of pay(useful) loads in pay(useful) load with big multichannel reusing degree, a plurality of multiplexed tributary signals are converted to a multiplexed high speed signal, this signal comprises bigger pay(useful) load and is added to this than the overhead byte in big pay(useful) load, this expense has than the bigger length of overhead byte on a trackside, and the overhead byte on this trackside comprises a plurality of maintenance informations relevant with administering and maintaining operation, with this multiplexed high speed signal of transmission.This multiplex transmission apparatus comprises overhead transmission circuit or the transmitting device that is used for transmission maintenance information, this transmission circuit or transmitting device comprise: extract circuit or extraction element, be used for extracting predetermined maintenance information from a plurality of branch road maintenance informations, cross over circuit or cross connection device, be used for information interconnection by extraction circuit or extraction element extraction, with insertion circuit or insertion device, be used for the output of cross over circuit or device is inserted into the precalculated position of high speed overhead byte, wherein the maintenance information that receives from a plurality of transmission channels collectively is transmitted or transmits.
The far-end transmitting device that is connected with this multiplex transmission apparatus by high-speed transmission line comprises overhead transmission circuit or transmitting device, this transmission circuit or transmitting device comprise: extract circuit or extraction element, be used for extracting predetermined maintenance information from a plurality of high speed maintenance informations, cross over circuit or cross connection device, be used for information interconnection by extraction circuit or extraction element extraction, with insertion circuit or insertion device, be used for the output of cross over circuit or device is inserted into the precalculated position of branch road overhead byte, wherein when this device received the high speed overhead byte that comprises the maintenance information that collectively sends it to, these signals were extracted, interconnection and being inserted on the precalculated position of a plurality of branch road overhead bytes to be transmitted on a plurality of branch road transmission lines.
At this, each above-mentioned multiplex transmission apparatus is handled multiplex signal, and this multiplex signal is by G.707 number suggestion or by American National Standards Institute's signal of number standard definition T.105 of International Telecommunications Union.Maintenance information waiting for transmission is included in the section overhead and line expense of branch road.In addition, directly connected and when not having regenerative repeater, section overhead also is used to transmit or transmit the amount of the maintenance information that increases when these multiplexers.When waited to be used as maintenance information when transmission by E byte, F byte, D byte, K byte and the Z byte of standard definition, these bytes are selected as it is and be transmitted.
On the other hand, as by the B byte of standard definition, being used on transmission channel the structure of transmission about the information of the quantity of mistake, carry circuit or the transfer device of providing as described below.In case detect the quantity of the mistake that on the receiving branch transmission line, produces, carry circuit or device just are inserted into the overhead byte of multiplexed high speed signal to this wrong quantity that produces, so that this wrong quantity is transferred in the multiplexed high speed signal.Then, the far-end multiplex transmission apparatus that receives the maintenance information that shifts comprises: extract circuit or extraction element, be used to extract the quantity of the error of transmission of near-end branch road, add circuit or adder, be used for of the quantity addition of the quantity of the error of transmission of the near-end branch road that extracts with the high-speed transfer mistake that detects by this multiplex transmission apparatus, with a circuit or a device, be used for the result of addition is inserted into the second high speed signal expense and changes this expense, or be used for the error detection signal that a quantity of the error of transmission corresponding with addition result is added to branch road.For another kind of structure or method, be arranged in the quantity of the middle multiplex transmission apparatus conversion of high-speed transmission line in the error of transmission of branch road, comprise with multiplex transmission apparatus: testing circuit or checkout gear, be used for detecting the quantity of the mistake that produces at high-speed transmission line, extract circuit or extraction element, be used to extract the quantity of the error of transmission of near-end branch road, add circuit or adder, be used for of the quantity addition of the quantity of the error of transmission of extracting with the error of transmission that detects by testing circuit or device, with a circuit or a device, be used for the error detection signal that a quantity of the error of transmission corresponding with addition result is added to branch road.
In addition, in order to address the above problem, use the above-mentioned device that is used for multiplex transmission apparatus according to multiplex transmission networks of the present invention, this multiplex transmission apparatus is used for by transmitting the maintenance information arbitrarily of branch road at the middle multiplexer between the multiplex transmission apparatus arbitrarily, so that multiplex transmission apparatus transmits between them and the maintenance information arbitrarily of receiving branch arbitrarily.
Fig. 1 is a frame assumption diagram, is used to explain the structure of the frame of branch road multiplex signal (OC-12);
Fig. 2 is a frame assumption diagram, is used to explain the structure of the frame of high-speed, multi-path multiplexed signals (OC-12);
Fig. 3 is a functional interpretation figure, is used for explaining the function in the multiplex signal expense;
Fig. 4 A, 4B and 4C are network structures, are used to explain the structure and the overhead processing interval of transmission network;
Fig. 5 is a frame assumption diagram, is used to illustrate the structure according to transmitting device of the present invention;
Fig. 6 is an expense structure chart, is used for explaining how passing through according to transmitting device of the present invention (multiplexer) transmission branch road expense;
Fig. 7 is an expense structure chart, is used for explaining how transmitting the branch road expense by transmitting device according to the present invention;
Fig. 8 is an operating instruction figure, is used in reference to the zoning that is shown in according to the branch road expense (B2 byte) in the transmitting device of the present invention;
Fig. 9 is a network structure, is used to illustrate the structure of utilization according to the transmission network of transmitting device of the present invention;
Figure 10 is a frame assumption diagram, is used for the structure of explanation according to another transmitting device of the present invention (ADM);
Figure 11 A and 11B are network structures, are used to illustrate the structure of utilization according to the transmission network of another transmitting device of the present invention;
Figure 12 A and 12B are operating instruction figure, are used for explaining the error of transmission detection architecture of using serial connection according to the transmission network of transmitting device of the present invention utilizing; With
Figure 13 is a network structure, is used to explain the structure of the transmission network of utilizing serial connection, and this serial connection is utilized according to transmitting device of the present invention.
Describe in detail with reference to the accompanying drawings according to the embodiment of transmitting device of the present invention and the embodiment of transmission system.
At first should be noted that: embodiments of the invention are to describe as an example with reference to the transmitting device and the transmission system that mainly are used according to SONET.Conventional transmission system is like this, be transmission frame expense each the device on by termination, and transmitting device of the present invention has the function that the branch road expense is passed through, so that make the device that needs within the transmission network can transmit and receive expense, can improve the operating characteristic that administers and maintains of transmitting device thus.Utilize the transmitting device of SDH in fact also to have identical structure with transmission system.
In order to help to understand the present invention, before the structure and operation described according to transmitting device of the present invention and transmission system, mainly explain structure and the operation that limits by SONET and SDH earlier.
Fig. 1 and 2 is the frame assumption diagram of the frame structure of explanation in the multiplex signal that is limited by SONET, and they show the multiplex signal structure of OC-12 (622.08Mb/s) and OC-192 (9953.28Mb/s).Fig. 3 is the key-drawing that expression is included in the function of each overhead byte in the multiplex signal.In Fig. 1-3, the signal in row 1-36 (OC-12) or row 1-576 (OC-192) constitutes expense (referring to the function of Fig. 3 about respective byte.In Fig. 1 and 2, represent undefined byte with " x "), and remaining zone has constituted the pay(useful) load part, main signal is by multiplexing in this pay(useful) load part.
Fig. 4 A-4C be used to explain the structure of the transmission network that adopts SDH or SONET and expense be transmitted the network structure of Transmission Time Interval of process.Within each expense in multiplex signal, row 1-3 constitutes so-called section overhead, this section overhead be used between transmitting device and/or regenerative repeater transmission intercal (being defined as " section ") administer and maintain operate relevant.The expense that produces in a device (comprising a regenerative repeater) is transmitted by transmission intercal and goes up by termination at next device (being represented by the fine line of band arrow in Fig. 4 A).Within continuous expense, row 5-9 has constituted so-called line expense, and this line expense is operated relevant with administering and maintaining of the transmission intercal (being defined as " line ") that is used for the order between the transmitting device of handling multiplexed main signal.The line expense that produces in a device is transmitted by transmission intercal and regenerative repeater (s) and goes up by termination at next device (being represented by the heavy line of band arrow in Fig. 4 A).Byte in the fourth line of expense is as designator.
In the transmission network that in Fig. 4 A, illustrates, utilize OC-12 transmission line to connect multiplexer B (2001) and multiplexer C (2004) by regenerative repeater 2002,2003.For example, when for the operation that administers and maintains between multiplexer B (2001) and multiplexer C (2004), when being ready for sending and receiving the D byte that is called data communication channel and being referred to as the E byte of interconnection, multiplexer (for example B) among the multiplexer is inserted into the data that need attended operation and speech signal in the D4-D12 byte and E2 byte in the online expense, and this line expense is sent on the OC-12 transmission line.Because the line expense is by the OC-12 transmission line and regenerative repeater is transmitted and go up by termination, so manage and attended operation between multiplexer B (2001) and multiplexer C (2004) at the multiplexer on the receiver side (C in Fig. 4 A).
Yet,, according to the increase needs of user and signal additional multiplexer is set so and transmission network is improved if if customer volume increases or send and the amount increase of received signal.Fig. 4 B shows the example that improves transmission network, wherein be provided with multiplexer B (2001), the multiplexer of multiplexer C (2004) correspondence is (in order to simplify, in Fig. 4 B, only show multiplexer B (2001), the multiplexer of the additional setting among the multiplexer C (2004)), and a plurality of high speeds and large-scale multiplexer E (2008), multiplexer F (2009) is introduced into and replaces regenerative repeater 2002,2003 and utilize high-speed transfer passage OC-192 to be coupled together so that, improved transmission network in addition with a large amount of signal of higher rate processing by them.
When making transmission network when becoming in the structure shown in Fig. 4 B in architecture advances shown in Fig. 4 A owing to increased the traffic, since SDH or SONET define the line expense on each multiplexer by termination, so the expense of coming from multiplexer B (2001) goes up termination at multiplexer E (2008).If do not take some countermeasures, the improvement in transmission network will cause lacking in that additional multiplexer (Fig. 4 A) is set utilize the operation that administers and maintains that expense carries out before between multiplexer B (2001) and multiplexer C (2004) so.
In order to address this problem, the present invention provides a kind of function of transmitting the branch road expense for each multiplexer, as shown in Fig. 4 C.Then, have the communication network of multiplexer of the present invention, can send and receive expense between the needed device within the transmission system, can improve the operation that administers and maintains of this transmission system thus by foundation.To describe in detail according to transmitting device of the present invention and transmission system and a kind of expense transmission/method of reseptance according to their structure and operation hereinafter.
Fig. 5 is the frame assumption diagram of explanation according to an embodiment of multiplexer of the present invention.Multiplexer of the present invention provides many branch road multiplex signals and high-speed, multi-path multiplexed signals, wherein each branch road multiplex signal expense and multiplexed main signal, the high-speed, multi-path multiplexed signals comprises expense and multiplexed main signal, so that processing, and multiplexed main signal in a plurality of branch road multiplex signals and the multiplexed main signal multichannel in the high-speed, multi-path multiplexed signals decomposed as the termination of the expense in each multiplex signal, substituting or the like.For example, multiplexer of the present invention provides 16 OC-12s (622.08Mb/s, referring to Fig. 1) as the branch road multiplex signal, and carrying out multiplexed/multichannel between branch road multiplex signal and high-speed, multi-path multiplexed signals OC-192 (9953.28Mb/s is referring to Fig. 2) decomposes and carries out overhead processing as being limited by SONET.In addition, multiplexer is delivered to the branch road expense in the branch road multiplex signal that inputs to multiplexer.Certainly, it should be understood that above-mentioned just example, and multiplex signal to be supplied can be sent out with any other speed except OC-1 ~ 192 or by the speed that SDH limits, and can change multiplex signal amount to be supplied according to the type of multiplex signal to be supplied.
In Fig. 5, multiplexer according to the present invention comprises: M group tributary signal transmission/receiving element 10-1 ~ 10-M is used for input and output branch road multiplex signal so that handle expense and the main signal that comprises therein; One group of high speed signal transmission/receiving element 11 is used for input and output high-speed, multi-path multiplexed signals so that handle expense and the main signal that comprises therein; Main signal is multiplexed/multichannel decomposition transform unit 100 be used for that multiplexed/multichannel is decomposed and conversion in the main signal and the main signal in the high-speed, multi-path multiplexed signals of branch road multiplex signal; Overhead processing unit 300 (300-1,300-2), this unit has constituted a feature of the present invention, and each unit is used for being included in the expense interconnection of each branch road multiplex signal and high-speed, multi-path multiplexed signals and being used to make the multiplexer of cross-coupled expense by itself; With control unit 400, be used to control whole multiplexer.This multiplexer is made up of above-mentioned parts so that carry out multiplexed/multichannel decomposition and the conversion and the overhead processing of signal.
More precisely, each tributary signal transmission/receiving element 10-1 ~ 10-M comprises: SOH (section overhead) termination unit 20-1 ~ 10-N, be used to carry out tributary signal reception and to the section overhead that receives handle and be used for by by it and the part that is sent to the section overhead byte of far-end multiplexer release; A LOH (line expense) termination unit 30-1 ~ 30-N is used to handle the line expense of a reception and is used for the similar mode of section overhead the part of line expense is released; LOH inserts unit 80-1 ~ 80-N, is used to add the line overhead byte of transmission and is used to insert the line overhead byte that sends from the far-end multiplexer; Insert unit 90-1 ~ 90-M with SOH, be used to add the delivery section overhead byte, insert the section overhead that sends from the far-end multiplexer, and the transmitting branch signal.High speed signal transmission/receiving element 11 comprises: high speed signal SOH termination unit 60; LOH termination unit 70; LOH inserts unit 40; Insert unit 50 with SOH, above-mentioned all unit are similar with the corresponding unit in tributary signal transmission/receiving element 10.Each overhead processing unit 300-1,300-2 comprise: the multiplexed unit 110,130 of expense is used for collecting the expense of extracting out from each next multiplex signal of transmission/receiving element (10-1 ~ 10-M, 11); Air separation unit 200 is used for the expense of collecting according to the pre-defined rule interconnection on the far-end multiplexer for this expense is sent to; With expense demultiplex unit 120,140, be used for that cross-coupled expense is distributed to corresponding multiplex signal transmission/receiving element (10-1 ~ 10-M, 11) LOH and insert unit or SOH insertion unit.According to above-mentioned structure, the invention provides a kind of multiplexer, this multiplexer is supplied with branch road multiplex signal and high-speed, multi-path multiplexed signals, be used for multiplexed/multichannel and decompose the main signal that is included in wherein, make some branch road expenses pass through multiplexer, these branch road expenses before were determined in utilizing the transmission system of multiplexer, and processing (termination/increase) these expenses, so that make the expense of needed multiplexer utilization between them, therefore, make it can be provided at the system configuration that administers and maintains the superior multiplexer in operational capacity aspect and realize high availability and high reliability.
Below in conjunction with example operation according to structure and the operation and the transmission system of multiplexer of the present invention is described, in this example, at tributary signal (interconnection E1, E2, data channel D1-D12, transmission conversion and control byte K1, K2, (device auto levelizer) error management byte B2 between line) expense in 15 multiplex signals within is passed through multiplexer, this multiplexer provides by the high-speed, multi-path multiplexed signals of OC-192 and the branch road multiplex signal by 16 OC-12s, and this expense is used between 15 pairs of transmitting devices, and this transmitting device utilizes branch road multiplex signal (between multiplexer B shown in Fig. 4 B and C).
Fig. 6 and 7 is structure charts of the expense in the high speed signal that uses in the multiplexer of this embodiment of explanation, and some expenses in tributary signal are inserted in these expenses so that this expense is delivered on the far-end multiplexer.Particularly, Fig. 6 shows the general structure of expense and the detailed structure of a part of expense, and Fig. 7 shows the detailed structure of all the other expenses.
What at first will explain is multiplex operation, and this multiplex operation is used for the receiving branch multiplex signal, these branch road multiplex signals are transformed into the high-speed, multi-path multiplexed signals and send these high-speed, multi-path multiplexed signalss.
SOH termination unit 20-1 ~ 20-M of each tributary signal transmission/receiving element 10-1 ~ 10-M and LOH termination unit 30-1 ~ 30-M with the similar fashion of utilizing conventional multiplexer to receive the expense of the multiplex signal that receives is carried out that conventional termination is handled and main signal send to main signal multiplexed/multichannel decomposition transform unit 100.At this, conventional termination is handled the inspection that relates to the normal condition of one section and one line between multiplexer itself and remote leg transmitting device, this remote leg transmitting device is positioned on the branch road multiplex signal transmitter side, wherein utilize the A byte to set up the synchronous of branch road multiplex signal, and as an example, utilize the B1 byte to check rub-out signal.In other words, utilize expense, for example utilize the expense that T.105 limits by ANSI to carry out operating relevant processing with administering and maintaining of branch line or section.According to the multiplexed rule of in the multiplexed converter unit 100 of main signal, determining in the past (for example, transforming to Fig. 2), the main signal of multiplexed branch road multiplex signal in the main signal of high speed signal from Fig. 1.On the other hand, multiplexer of the present invention transmits a part and use these branch road expenses between the multiplexer of needs, so that SOH termination unit 20-1 ~ 20-M and LOH termination unit 30-1 ~ 30-M are with the expense (except the B2 byte) that receives, so that this expense is sent to overhead processing unit 300-1.Can not pass through simply owing to the reason that will describe in the back makes the B2 byte, send overhead processing unit 300-1 to so each LOH termination unit 30-1 ~ 30-M checks an error number and a detection error number of coding in the branch line that is detected as normal B2 byte termination processing.
Overhead processing unit 300-1 carries out interconnection and processing, so that select an a part of branch road expense and a branch road expense of selecting to be inserted in the undefined zone of expense in high-speed, multi-path multiplexed signals to be sent, the selection part of transmitting the branch road expense that is received by multiplexer thus is so that send it to the far-end multiplexer.The expense that sends from each tributary signal transmission/receiving element 10-1 ~ 10-M is collected in the multiplexed unit 110 of expense.Particularly, when the branch road multiplex signal is 16OC-12s, by each tributary signal transmission/receiving element 10-1 ~ 10-M transmission formative expense as shown in FIG. 1, so that each tributary signal transmission/receiving element 10-1 ~ 10-M utilizes the multiplexer in multiplex transmission apparatus sequentially to be access in so that from each unit 10-1 ~ 10-M select branch road expense waiting for transmission and according to the type of expense the expense classification of selecting.As an example, D4 byte (referring to Fig. 1) is positioned at the 6th row, the 1st row of each branch road multiplex signal be collected and in the high-speed, multi-path multiplexed signals from the 5th rank transformation to the 61 row of the 6th row (referring among Fig. 6 1000,1002), so that the D4 byte is passed through by means of the high-speed, multi-path multiplexed signals.Utilize this method, the expense of branch road multiplex signal is classified into each type and is inserted in the high-speed, multi-path multiplexed signals in the undefined byte, so that each sequence of unit ground is entered the expense of collecting every type.More precisely, in the above-mentioned example that provides, carry out multiplexed so that only be collected in D4 byte in each branch road multiplex signal.In addition, even each branch road multiplex signal is different on the frame phase place, its input side of the multiplexer in the multiplex transmission apparatus is provided with buffer so that can be multiplexed.On the other hand, each unit can make the phase alignment of giving the signal of the multiplexed unit 110 of expense to be passed.In the time of will receiving the B2 byte of having described after in the LOH termination unit, handling, can receive B2 itself, therefore in the multiplexed unit 110 of expense, carry out above-mentioned processing from the LOH termination unit.
Empty branch converting unit 200 is sending its branch road overhead byte interconnection to from the multiplexed unit 110 of expense, so that further the branch road overhead byte is resequenced.When utilizing this sky branch converting unit in this embodiment, certainly replace with a timing switch.If it can interconnection be used to select, resequence, or the like the branch road expense, just can utilize any switch, so that the expense that receives from each branch road multiplex signal can be inserted in the predetermined bite of the undefined byte the high-speed, multi-path multiplexed signals.Specifically, in this is implemented, the expense of 15 multiplex signals (1-15) in 16 branch road multiplex signals on OC-12s is transmitted, so that empty branch converting unit 200 only is chosen in expense waiting for transmission within the multiplex signal (1-15) from the output of the multiplexed unit 110 of expense.For example; the expense of selecting comprises: interconnection E1; E2, data channel D1-D2, protect conversion and control byte K1 automatically, K2 and line (multiplexer-to-multiplexer) error check byte B2 (referring to 1000-1004,1100-1107 and 1200-1208 in Fig. 6 and 7).Similarly, described at Fig. 1, the D1 byte than D4 byte more behindhand by multiplexer (referring in Fig. 6 1000,1001,1004) afterwards, the D1 byte that is arranged in than the head of more close this frame of D4 byte is inserted into the high-speed, multi-path multiplexed signals.In other words, empty branch converting unit 200 also makes the order rearrangement of branch road expense waiting for transmission, so that a kind of stated type of branch road expense can be inserted in the byte of the previous regulation of undefined byte in the high speed overhead area.
Expense demultiplex unit 120 receives the branch road expense that sends from sky branch converting unit 200, resolve into section overhead and line expense with an expense multichannel that receives, so that they are inserted in the previous byte of determining in the overhead area of the high-speed, multi-path multiplexed signals shown in Fig. 6 and 7, and the expense that multichannel is decomposed sends high speed signal transmission/receiving element 11 to.With the D4 byte of each branch road multiplex signal as an example, from each branch road multiplex signal, extract the D4 byte of each branch road multiplex signal out, so that be listed as the 61st D4 byte of in 4 row, inserting each branch road multiplex signal that is listed in overhead area the high-speed, multi-path multiplexed signals from the 5th of the 6th row, as among Fig. 6 by shown in 1000 and 1002.
With with the similar mode of conventional multiplexer, insert unit 50 and LOH inserts unit 40 by means of SOH, high speed signal transmissions/receiving element 11 generation overhead bytes use at interval for the spacer segment and the line of high speed transmitter side.In addition, expense that high speed signal transmission/receiving element 11 handles are extracted out by the tributary signal receiving element and that receive from expense demultiplex unit 120 is inserted in the undefined byte of before stipulating the line expense of high speed signal, as as shown in Fig. 6 and 7, so that produce expense to be sent, this expense be added to by main signal multiplexed/main signal of the multiplexed high speed signal in multichannel decomposition transform unit 100 on so that produce high-speed, multi-path multiplexed signals by 11 transmissions of high speed signal transmissions/receiving element.It should be noted: in this embodiment, if regenerative repeater is positioned at the centre of transmission channel, so section overhead on this regenerative repeater by termination, so that only the expense of being extracted out by the tributary signal receiving element is inserted in the line overhead area of high speed signal.Certainly, if do not have regenerative repeater in the centre of transmission line so that section overhead not by termination till the transmitting device of destination, the undefined byte in the high regime overhead area can be used for a branch road expense of extracting out is inserted into them so.Under this sight, can transmit the expense of a large amount of branch road multiplex signals.
Following explanation is about the operation on the multichannel decomposition side, and it is used for a high-speed, multi-path multiplexed signals that receives is transformed into branch road multiplex signal and this branch road multiplex signal of transmission.
With with tributary signal transmission/receiving element 10 similar modes, the SOH termination unit 60 of high speed signal transmission/receiving element 11 and LOH termination unit 70 terminates to the expenses in the high-speed, multi-path multiplexed signals that receives on the conventional demultiplexer similarly, so as main signal send to main signal multiplexed/multichannel decomposition transform unit 100.Utilize main signal multiplexed/multichannel decomposition transform unit 100 resolves into this main signal multichannel the main signal of tributary signal.On the other hand, because the expense that receives comprises the expense that sends from the far-end multiplexer, these expenses waiting for transmission are used as the branch road expense, so SOH termination unit 60 and LOH termination unit 70 taken off the expenses that receive, and they are sent to overhead processing unit 300-2.
Overhead processing unit 300-2 carries out interconnection and processing, so that select to be inserted into the expense in the precalculated position in each branch road multiplex signal, a transmission part thus is used to be sent to the expense of the reception of other branch road transmitting device.Therefore, overhead processing unit 300-2 carries out similarly handling with the processing that opposite order carries out with overhead processing unit 300-1 on multiplexed side on multichannel decomposition side.Specifically, the multiplexed unit of expense 130 collect from the transmission of far-end multiplexer and by the expense of high speed signal transmissions/receiving element 11 receptions, send its expense with 210 interconnections of sky branch converting unit to by the multiplexed unit 130 of expense, so that once more they are resequenced.Equally, expense demultiplex unit 140 resolves into section overhead and line expense to the expense multichannel that sends from sky branch converting unit 210, and these expense multichannels are decomposed, so that these expenses are inserted in the byte of the previous regulation in the overhead area of each the branch road multiplex signal shown in Fig. 1 and the expense that multichannel is decomposed sends to each tributary signal transmission/receiving element 10-1 ~ 10-M.
Utilize and the similar mode of conventional multiplexer, insert unit 80-1 ~ 80-M and SOH insertion unit 90-1 ~ 90-M by means of LOH, each group generation overhead byte of M group tributary signal transmission/receiving element 10-1 ~ 10-M uses at interval for the spacer segment and the line of branch, and extract out by the high speed signal receiving element and be inserted in the overhead byte of before the line overhead area of tributary signal, stipulating from the expense that expense demultiplex unit 140 receives, as shown in FIG. 1, so that produce expense to be sent, this expense be added to by main signal multiplexed/branch road main signal that multichannel decomposition transform unit 100 multichannels are decomposed so that produce the branch road multiplex signal that sends the branch road transmission line subsequently to.
The processing of transmitting the B2 byte according to of the present invention in the transmitting device that can be sent to the branch road expense that receives in the far-end transmitting device is described below in conjunction with the multiplexer that uses in the above-described embodiments.
Fig. 8 is the operating instruction figure that is used to explain B2-byte zoning, and this zoning is used for checking the transmitting device center line error of transmission at interval according to SONET or SDH use.Transmitting device utilization according to SONET or SDH use is arranged in the overhead area designator, (the H-byte on the 4th row) as shown in FIG. 1, so that identification is used for the phase place of the multiplex signal of the signal processing as multiplexed/multichannel is decomposed, reduce the delay of this multiplex signal thus.Each transmitting device only to the frame update designator that forms multiplex signal discerning this frame once more, and do not adjust, and conventional transmitting device need be adjusted the phase place of frame based on the then phase place of the frame of a device of a device.Reason for this reason, produce deviation between the B2 zoning of the B2 zoning of the multiplex signal that is updated in reception of designator and multiplex signal to be sent, as shown in FIG. 8, thus, even the B2 byte that receives is to transmit with the similar mode of other overhead byte, the transmitting device that receives expense can not correctly detect the mistake of being notified by the B2 byte that receives.
Shown another kind of method is: because the B2 byte can not directly be transmitted, as described above, the multiplexed side of multiplexer is so constructed,, each LOH termination unit 30-1 ~ 30-M of tributary signal transmission/receiving element determines the quantity of the mistake of detection so that reading (termination) B2 byte, and transmission is to the encode signal of (representing with " j " in following explanation) of the quantity of the mistake that detects, so that wrong quantity notice destination transmitting device.Specifically, each multiplex signal (in Fig. 1 the 5th the row on the 1st be listed as the 12nd row) the B2 byte by termination so that produce a signal (quantity of representing wrong j), this signal is inserted in the undefined byte in the overhead area of high-speed, multi-path multiplexed signals (being 1103 in Fig. 7), is sent out in the high-speed, multi-path multiplexed signals then.
Decompose on the side in the multichannel of multiplexer, represent the signal of the quantity of wrong j can not be to be transmitted to branch, because it is different with the definition of B2 byte, so that in the leg distal end device, can not detect the quantity of mistake with the similar mode of other overhead byte.In addition, the quantity of the mistake that produces between the transmission channel between the transmitting device (between the transmitting device B and C in Fig. 4 B) of needs is the quantity that needs mistake to be sent He to be received.Yet, because the value of j is not included in the quantity of the mistake that produces on the high-speed transmission line between the multiplexer, so also will consider the mistake of this high-speed line.In addition, to decompose side be in order to carry out the processing the following processing of carrying out on the above-mentioned B2 of being combined in byte to the multichannel that forms the multiplexer of this embodiment.
At first, the LOH termination unit 70 of high speed signal transmission/receiving element 11 read be used for detecting the B2 of the error of transmission between high speed multiplexer byte (this B2 byte original high-speed, multi-path multiplexed signals be defined and the 5th row in the structure chart of Fig. 2 and 6 the 1st be listed as in the 192nd row be illustrated), so that find the quantity of wrong i.LOH termination unit 70 is also separated the quantity of the detection mistake j of coding from the line expense of high speed signal (among Fig. 6 1103), and calculates
iSummation with j
k
Then, the multiplexed unit of the expense of overhead processing unit 300-2 130 is this
kValue is multiplexed and they are sent to empty branch converting unit 210 with other overhead byte.Empty branch converting unit 210 is resequenced the overhead byte of transmission so that send tributary signal transmission/receiving element to.Expense demultiplex unit 140 resolves into the overhead byte multichannel that transmits from sky branch converting unit 210 section overhead and the line expense of waiting to send to M group tributary signal transmission/receiving element 10-1 ~ 10-M.
Then, LOH insert each unit among unit 80-1 ~ 80-M produce the B2 parity check that is used to a frame to be transmitted, counter-rotating and
kCorresponding some positions, the insertion B2 byte of value sends on the branch road transmission line as the expense of tributary signal and this expense, makes the branch road far-end detect mistake by transmitting device thus.Certainly, it should be understood that and utilize and the operation that can be used for B2 byte on multichannel decomposition side in similar mode on the multiplexed side, that is, in opening multiplexed unit 130, can calculate
k, or in LOH insertion unit 80-1 ~ 80-M, can collectively calculate
kAnd bit reversal.
Multiplexer as an embodiment of the transmitting device of the invention described above is formed in this wise, promptly, when the information that receives from network management unit or similar units (not shown) about system configuration, control unit 400 be identified for overhead processing unit 300, multiplex signal transmission/receiving element 10-1 ~ 10-M and 11, or the like set point, so that can select to treat the type of the expense by multiplexer thus and select the position of undefined byte, this expense is inserted in this undefined byte.
Fig. 9 is a network structure, and this block diagram illustrating utilizes the example of structure of the transmission network of multiplexer of the present invention.More precisely, Fig. 9 understands the structure of network in detail, in this network, is used as the additional multiplexer E that installs, F at the multiplexer shown in above-mentioned Fig. 5 in the network structure shown in Fig. 4 B.Should be noted that: Fig. 9 has explained an example, and expense is decomposed side from multiplexer B is sent to multiplexer C and the multiplexer explained according to the present invention includes only each multiplexer needs multiplexed side and multichannel in this example.
Utilize the transmission network of multiplexer of the present invention to comprise: multiplexer B2001 is used for multiplexed main signal so that the branch road multiplex signal is sent to transmission line 500; Multiplexer E2006 is used for further multiplexed branch road multiplex signal so that the high-speed, multi-path multiplexed signals is sent to high-speed signal transmission lines 501; Multiplexed unit F 2007 is used for the high-speed, multi-path multiplexed signals multichannel that receives from high-speed transmission line 501 is decomposed so that the branch road multiplex signal is sent to tributary signal transmission line 502; With multiplexer C2004, be used for further branch road multiplex signal multichannel being resolved into the branch road main signal, wherein the main signal of being handled by multiplexer B2001 sends multiplexer C2004 to, and the expense in the branch road multiplex signal also transmits between multiplexer B2001 and multiplexer C2004, so that this transmission system is managed and attended operation.
Explain in more detail below, when being added to by multiplexed main signal and expense, multiplexer B2001 produces the branch road multiplex signal on the multiplexed main signal, when this branch road multiplex signal is sent to tributary signal transmission line 500, multiplexer E2006 terminates at the expense in the branch road multiplex signal, multiplexed this main signal and produces the expense that is used for the high-speed, multi-path multiplexed signals, and it constitutes the overhead transmission processing of feature of the present invention simultaneously.As described with reference to Fig. 5-7 in front, utilize tributary signal SOH termination unit 20 and tributary signal LOH termination unit 30, by the multiplexed unit 110 of expense, the empty overhead processing unit 300-1 that divides converting unit 200 and expense demultiplex unit 120 to form, and high speed signal LOH inserts unit 40 and high speed signal SOH inserts unit 50, by the expense in the branch road multiplex signal of control unit 400 regulations, carry out transmission process by interconnection selectively so that the expense of regulation is inserted in the assigned position of the overhead area of high-speed, multi-path multiplexed signals (referring to Fig. 6 and 7).When the expense of regulation comprises the B2 byte, also carry out the B2-byte and handle, as mentioned above.
Received and comprised expense waiting for transmission and decompose main signal and produce the expense that is used for the branch road multiplex signal from expense, multichannel that the multiplexer F2007 that multiplexer E2006 sends the high speed multiplexer signal of high-speed transmission line 501 to terminates at the high-speed, multi-path multiplexed signals, simultaneously, the overhead transmission that constitutes feature of the present invention is handled.As previously described, this transmission process is the opposite processing of the transmission process undertaken by multiplexer E2006, wherein be used for being included in the high-speed, multi-path multiplexed signals and by the expense of the branch road multiplex signal waiting for transmission of control unit 400 regulations selectively by interconnection and be inserted in the position of stipulating in the overhead area of each branch road multiplex signal.The overhead processing unit 300-2 that utilizes high speed signal SOH termination unit 60 and high speed signal LOH termination unit 70, forms by the multiplexed unit 130 of expense, empty branchs converting unit 210 and expense demultiplex unit 140 and branch road LOH inserts unit 80 and branch road SOH insertion unit 90 carries out this overhead transmission processing.When the expense of regulation comprises the B2 byte, also carry out the B2-byte and handle, as mentioned above.
Therefore, even between original multiplexer B and C, additionally inserted multiplexer E, in the transmission network of F, above-mentioned structure and operation can make the multiplexer of low speed transmissions expense and main signal to be transmitted between multiplexer B and the C on additional multiplexer E or F not by termination.
Multiplex transmission apparatus utilization of the present invention is in conjunction with the described structure of the foregoing description and operate any expense that can be transmitted in the multiplex signal.In other words, even as being modified in the transmission system as shown in Fig. 4 A as in the new system as shown in Fig. 4 B, in the above-described embodiments the expense that so far between multiplexer B and C, is utilized of the multiplexer of Miao Shuing (if as increase newly multiplexer) transmission and not terminating they so that also can utilize this expense between multiplexer B in the improvement system and the C.Thereby, do not influence the ability that administers and maintains operation between multiplexer by the structure of improving transmission system.In addition, because multiplexer of the present invention allows to use expense between the multiplexer that needs arbitrarily, so the ability with higher management and attended operation can be provided, user-operable be provided and help to set up the multiplexer of transmission system flexibly.
Describe according to another embodiment of multiplexer of the present invention and utilize an embodiment of the transmission system or the transmission network of this multiplexer below with reference to corresponding accompanying drawing.
Figure 10 is a frame assumption diagram, and this figure illustrates the embodiment of an increase and decrease type multiplexer (after this abbreviating " ADM " as), and this ADM is according to transmitting device of the present invention.Figure 11 A and 11B are the network configurations that the embodiment of the transmission network of utilizing ADM of the present invention is described.
ADM of the present invention provide high-speed, multi-path multiplexed signals that a plurality of branch road multiplex signals that comprise expense and multiplexed therewith main signal and two comprise expense and multiplexed therewith main signal and to the expense in each multiplex signal as termination, renewal, or the like processing.In addition, ADM the multiplexed main signal of a plurality of branch roads be inserted in the multiplexing main signal of high-speed, multi-path (increase), from the multiplexing main signal of high-speed, multi-path branch out the multiplexed main signal of a plurality of branch roads (minimizing), the multiplexing main signal of high-speed, multi-path is connected (interconnection) with other signal cross and transmit the multiplexing main signal of this high-speed, multi-path (by).Similar with the above embodiments, transmit the branch road multiplex signal by OC-12, and transmit the high-speed, multi-path multiplexed signals by OC-192s.This ADM advance to handle main signal and carry out overhead processing as limiting in SONET, and also is transmitted in a part of expense in the multiplex signal that inputs to it, so that utilized the expense of this transmission by the far-end multiplexer.Then, utilize the network of this ADMs have linear structure (Figure 11 A) or in cyclic structure (Figure 11 B) by (OC-192) interconnective ADMs of high-speed transmission line (spans).In addition, the transmitting device as the multiplexer (OC-12) is connected with ADMs by transmission line (spans).According to above-mentioned structure, handle so that send and be received in the main signal between the multiplexer except carrying out aforesaid main signal, ADMs carries out handling so that send and be received in any expense in the branch road multiplex signal between any multiplexer according to overhead transmission of the present invention, set up a transmission system very flexibly thus, this transmission system allows the multiplexer in network freely to send and receive expense and the main signal between them, and the higher ability that administers and maintains operation is provided.
Be used to increase except additionally being provided with one, minimizing, interconnection and the main signal insertion/separative element 105 to the transmission operation of main signal, in fact the structure of ADM is identical with the structure of above-mentioned multiplexer.Except the position and symbol that in Figure 10, change in order to adapt to ADM, remaining functional unit that uses in Figure 10 is identical (in Figure 10, representing with identical symbol with the identical functions unit, unit in Fig. 6) with the corresponding unit in above-mentioned multiplexer.In following explanation, will structure and the operation different with above-mentioned multiplexer only be described especially.
Because high speed signal transmission/receiving element 11 is used to ADMs is interconnected by high-speed transmission line (referring to Figure 11 A and 11B) in this embodiment, so two high speed signal transmission/receiving elements 11 are set in each ADM, be unit, west side 11-1 and unit, east side 11-2, so that be connected with ADMs in both sides.Similarly, high speed signal transmission/receiving element 11-1,11-2 and main signal multiplexed/add main signal insertion/separative element 105 between the multichannel decomposition transform unit 100, so that high speed signal transmission/receiving element 11-1,11-2 can send with tributary signal/receiving element 10-1 ~ 10-M is connected, can interconnect with high speed signal transmission/receiving element 11-1,11-2, handle so that carry out main signal as described above.
In addition, this ADM also is suitable for expense is transferred to another high-speed, multi-path multiplexed signals from a high-speed, multi-path multiplexed signals, so that the sky of overhead processing unit 300 divides selectively interconnection expense waiting for transmission of converting unit 200, this expense by the unit of the multiplexed unit 130 of expense from high speed signal transmission/receiving element (for example, the unit, east side) is received in, and cross-coupled expense (is for example sent to another high speed signal transmission/receiving element, the unit, west side), this unit is inserted into expense waiting for transmission on the byte of stipulating in the overhead area of high-speed, multi-path multiplexed signals.
Thereby, when treating when the expense that a high-speed, multi-path multiplexed signals is transferred to another signal is included in information on the B2 byte, the LOH of high speed signal transmission/receiving element 11 inserts unit 40 not to carry out inserting the bit inversion that unit 80 is carried out as the LOH of tributary signal transmission/receiving element 10-M in above-mentioned multiplexer, but the quantity (because result of B2 byte termination) at the wrong i that produces on the high-speed transmission line of input is added on the quantity of wrong j of reception, so that obtain the quantity of a total wrong k who is transmitted.On the other hand, can realize being used for detecting structure, will be described this subsequently in this expense transmission/reception error of transmission at interval by the structure of utilizing a kind of serial connection.
ADM also is configured to depend on control unit 400, and this control unit 400 is pointed out the type of expense waiting for transmission and the position that is inserted into to each functional unit, so that each functional unit responds ground carries out the insertion of interconnection, selection and expense.Control unit 400 also is connected so that receive from the control information at the network management unit 2017 shown in Figure 11 A and the 11B.Specifically, network management unit 2017 is suitably pointed out the type of expense waiting for transmission and the position that is inserted into to each ADM, so that avoid a conflict or contradiction, allow thus freely to be transmitted and to receive between expense and the main signal multiplexer in network.
As mentioned above, according to the present invention, expense can be transmitted by multiplexer arbitrarily, so that in being similar to the ADM that the foregoing description describes and in transmission network or utilizing between any multiplexer in the transmission system of ADMs and can use this expense.Therefore, because the structure of system is improved, not have the transmission system of variation so it can provide a kind of to administering and maintaining operational capacity, that is, it administers and maintains aspect operational capacity, flexibility and the applicability more excellent in improvement.
Below with reference to another structurally different embodiment a kind of structure that is used for detecting the error of transmission that occurs in the transmission intercal between the multiplexer that sends and receive expense is described with the foregoing description.Specifically, this embodiment is equivalent with the structure of the transmission system that adopts SONET or SDH, this SONET or SDH notice are receiving the error of transmission that produces the interval of multiplexer from the overhead transmission multiplexer to the expense of utilizing serial connection, wherein serial connection is standardized by ANSI or ITU-T, that is, by getting involved the structure of multiplexer transmission B2 byte.Therefore in above-mentioned multiplexer and ADM, utilize structure arbitrarily.
Figure 12 A and 12B are the operating instruction figure to utilizing serial connection to come the structure of detected transmission mistake to make an explanation.More precisely, Figure 12 A shows the structure according to this embodiment, and Figure 12 B shows the structure chart that is used for the detected transmission mistake in conjunction with above-mentioned multiplexer or ADM explanation, and Figure 13 is the structure chart that explanation utilizes the transmission network of a serial connection.With reference to these figure, the structure that utilization according to the present invention is connected in series the detected transmission mistake is described below by comparing with the foregoing description.
As shown in Figure 12 B, the foregoing description is configured to transmit the B2 byte by certain multiplexer, so that utilize the B2 byte in the transmission intercal between different multiplexers to detect mistake.For this purpose, this B2 byte of multiplexer termination of each transmission B2 byte, detect the quantity of wrong i, the quantity of wrong i be added on the quantity of the wrong j that notifies by the source multiplexer so that the quantity that obtains the quantity of total wrong k and transmit this total wrong k.Then, the terminal multiplexer of transport overhead produces the B2 byte from the quantity (the k ｀ among Figure 12 B) of last total mistake, wherein the B2 byte gets involved in the multiplexer at each and is increased, and make the bit reversal of B2 byte, so that the error of transmission that notice produces during the multiplexer of destination at the multiplexer that starts from expense.
In the transmission system that adopts SONETH or SDH, between source unit and unit, destination, mainly carry out the management of channel.Yet, if the channel from source channel head joint equipment (PTE) 4000-1 to destination PTE4000-2 is through the network area by different governing plan management, as shown in Figure 13 (in this embodiment, this channel is through network management zone 1-3), so it need be in each management area independently management channel so that determine the zone that produced fault.Therefore, as ansi standard T1.150 or ITU-T standard G.707 in defined, the interval that connects at the line end that comprises a plurality of continuous connections between two borders of management area of equipment (LTEs) and line is defined as serial connection, and defines the management method that is used for this serial connection.Specifically, utilize a channel overhead POHs among a plurality of channel overhead POHs be included in the pay(useful) load that illustrates in the frame structure of Fig. 1.Utilization is used for detecting in the B3 byte of the mistake of channel in the 3rd row and utilizes in the 9th row as the Z5 byte of the byte that is used to manage serial connection and manage error of transmission.As an example detection of the error of transmission in the serial connection of management area 1 is described, LTE 4001 monitors and is used for mistake
1The B3 byte of quantity, this mistake
1Producing to the channel of LTE 4001 from source PTE 4000-1, and this mistake
1Quantity be inserted in the Z5 byte and and send LTE 4002 to this multiplex signal.LTE 4002 monitor once more in wrong 1 ｀ number the B3 byte, this mistake 1 ｀ is producing to the channel of LTE 4002 from source PTE 4000-1, and deducts from the quantity of wrong 1 ｀ by the Z5 byte and receive mistake
1Quantity so that the quantity of the mistake that in serial connection, produces of management.
In the structure of in the embodiment of the error of transmission that the transmission intercal that is used for detecting between the multiplexer that is sending and receiving expense produces, describing, at first transmit the inlet multiplexer that first multiplexer 2030 of the expense in the branch road multiplex signal is considered to be connected in series, the last path multiplexer 2032 of the expense in the transmission branch road multiplex signal is considered to terminal multiplexer, as as shown in Figure 12 A, so that utilize the serial connection management method of aforesaid B3 byte and Z5 byte to transmit wrong quantity.
Specifically, multiplexer 2030 is inserted in the specified byte in an overhead area of high-speed, multi-path multiplexed signals and in mode similar to the above embodiments the quantity of the mistakes (j) that detect the B2 byte of termination branch road multiplex signal after coding, the quantity of the mistake of encoding this high-speed, multi-path multiplexed signals is sent to destination multiplexer (3001,3002) by transmission line.Similarly, multiplexer 2030 checks that in the scope of itself a B byte and mistake (a 1) quantity that checks of the quantity of the mistake that is used for having produced are inserted in the Z5 byte so that transmit the quantity of this mistake (3003) on channel.
The mistake (3004 that 2031 transmission of the intervention multiplexer of transport overhead receive, 3002) quantity, and mistake (i) quantity that detect and by B2 byte notice is not added to mistake (1) quantitatively on the line between the multiplexer, as above-mentioned embodiment (Figure 12 B) multiplexer carried out.Certainly, carry out the termination (in the generation of error detection on the receiver side and the parity check bit on transmitter side) of B2 byte as a rule, yet it handles with the overhead transmission of explanation in this embodiment irrespectively processed.Similarly, because at interchannel, just, on the root between channel head joint equipment (PTEs) 4000-1 and the 4000-2, can detect B3 byte and Z5 byte, so, except these bytes were transmitted as main signal, the transmitting device of this embodiment did not need other processing (being used for the detection of the quantity of mistake).
Multiplexer 2032 is extracted mistake (j) quantity of sending from multiplexer 2030 (3004) out.Similarly, as mentioned above, check the B3 byte, and from mistake (1 ｀) quantity that produces at channel, deduct the value of the Z5 byte (1) of reception up to multiplexer 2032, so that obtain quantity (1 ｀-1 of error of transmission, promptly Cuo Wu quantity equals the i+i ｀ in Figure 12 B), this wrong quantity is to produce on the transmission channel between the multiplexer 2030 and 2032 (serial connection) (3005).Then, mistake (j) quantity that receives and result of calculation (1 ｀-1) addition so that obtain wrong (k ｀) quantity, this mistake (k ｀) quantity is that and the bit quantity that equates with k ｀ in the B2 parity check bit that produces is inverted and is transmitted to destination multiplexer 2033 (3006) so that similarly mode is in that 2032 transmission intercal produces from the source multiplexer to multiplexer with the foregoing description (3001).
Aforesaid structure and method also provide the similar result with embodiment noted earlier, the B2 byte is by getting involved the multiplexer transmission among the described in front embodiment, make thus and might notify the destination multiplexer error of transmission that this error of transmission is to produce on source multiplexer that sends and receive expense and the transmission intercal between the multiplexer of destination.Similarly, according to above-mentioned structure, the intervention multiplexer of transport overhead does not need to calculate.Owing to only need first and last multiplexer to calculate, so in the interval of a large amount of multiplexers that comprise transport overhead, can reduce the software amount.Can select a kind of structure in this embodiment said structure (Figure 12 B) and the structure (Figure 12 A) according to the scale of ad hoc network or system.
As mentioned above, because the ADMs that utilizes multiplexer according to the present invention and have a transport overhead function sets up transmission network, will not influence the ability that administers and maintains operation so this network is out of shape, this situation often takes place in conventional transmission system.Similarly, owing between any two multiplexers within the transmission network, can transmit and receive expense arbitrarily, so can easily realize having the good flexible net that administers and maintains operational capacity.Specifically, can send and receive interconnection E1 between any two multiplexers, E2 is so that allow the tradesman to carry out telephone communication.In addition, can transmit and receive data communication channel D1-D12, make thus and might set up a structurally transmission network flexibly of change easily so that be provided for the various parameters etc. of multiplexer.Particularly, according to SONET, transmit D1-D12 so that each multiplexer is adjusted from network management unit or similar units, in this case, if be utilized by the structure that gets involved the such data communication channel D1-D12 of multiplexer transmission according to the present invention, the data that need so to adjust can easily be transferred to the destination multiplexer, and do not need to utilize the control unit of multiplexer to carry out the intervention of complex process, as under the situation of conventional multiplexer, each multiplexer must termination once and once more transmit expense.Therefore, can be understood that: the present invention is very effective administering and maintaining in the operation of transmission network.In addition, owing to can transmit and receive the conversion and control byte K1 of the conversion that is used for the control transmission line, K2 does not conflict between multiplexer so that carry out the selection of transmission line, if so transmission line is out of order, network configuration can be changed immediately or be re-constructed so.For error of transmission, though between source multiplexer and destination multiplexer, can not directly transmit the B2 byte, but the quantity of the mistake that produces can detect reliably with notified, so that might be implemented in the management of error rate in the transmission intercal, this management is equivalent to the management that is realized by the B2 byte that transmits and receive between direct-connected source multiplexer and destination multiplexer, wherein be not provided with any intervention multiplexer.Certainly, can be understood that: if also to transmit other expense illustrated in fig. 3 with the similar mode of above-mentioned expense, so similarly they can be used to the operation that administers and maintains between multiplexer.
In the present invention, as mentioned above, in overhead area, select undefined byte and treating that expense by the transmitting device transmission is inserted on the undefined byte in multiplex signal, then this expense of transmission in multiplex signal by the multiplex signal of standard definition.In other words, in transmission network or transmission system, byte to be used can pre-determine before transmitting and receiving, or can utilize data communication channel explained before to change the set point of used byte in transmission with before receiving these bytes.Since have only undefined byte be available, can be provided with freely according to the quantity of transmitting device within transmission network and the amount of information that administers and maintains operation, so can provide a kind of transmitting device and a kind of transmission network, even they have and sufficiently highly administer and maintain operational capacity so that can deal with neatly in network configuration or administer and maintain the variation in the method for operation or deal with the further variation that has in standard.
According to multiplex transmission apparatus of the present invention and multiplex transmission networks, needed transmitting device is allowed to transmit and receives the expense that is used to be loaded with the information relevant with administering and maintaining operation within network, on this expense each transmitting device in a conventional transmission system by termination, so that it can provide a kind of transmitting device and transmission network with high management and attended operation ability, and with variation in network configuration with or have nothing to do with the variation of using that administers and maintains in the method for operation.
Claims (31)
1. multiplex transmission apparatus, be used to receive first transmission frame, this transmission frame have a plurality of multiplexed therein signals, for described multiplex signal carry out that multichannel is decomposed and interconnection is handled, the signal of multiplexed processing and export described second transmission frame in one second transmission frame after this, it is characterized in that described transmitting device comprises:
A receiving circuit is used to receive first transmission frame, and this transmission frame comprises first pay(useful) load that contains a plurality of main signals and contains a plurality of first expenses that administer and maintain operation information;
A termination circuit is used for described first expense of termination;
A treatment circuit is used for multiplexed/multichannel decomposition or the interconnection main signal in described first pay(useful) load;
An extraction circuit that is connected with described termination circuit is used for extracting predetermined byte in described first expense;
A cross over circuit is used for the byte interconnection by described extraction circuit output;
One produces circuit, is used to produce one second expense, and this second expense comprises a plurality of operation informations that administer and maintain of waiting to export to a far-end communications device, and described second expense comprises an output of described cross over circuit; With
A transtation mission circuit is used for comprising that one second pay(useful) load and described second expense of the output of described treatment circuit send as described second transmission frame.
2. require 1 multiplex transmission apparatus according to power, also comprise:
One is inserted circuit, is used for the output of described cross over circuit is inserted into precalculated position in described second expense.
3. multiplex transmission apparatus, be used to receive a plurality of first transmission frames, each transmission frame have a plurality of multiplexed therein signals, for described multiplex signal carry out that multichannel is decomposed and interconnection is handled, the signal of multiplexed processing and export described second transmission frame in one second transmission frame after this, it is characterized in that described transmitting device comprises:
A plurality of receiving circuits, each receiving circuit is used to receive first transmission frame, and this transmission frame comprises first pay(useful) load that contains a plurality of main signals and contains a plurality of first expenses that administer and maintain operation information;
A plurality of termination circuit, each termination circuit are used for each first expense of described first expense of termination;
A multiplexed translation circuit is used for multiplexed or the described a plurality of main signals of interconnection;
An extraction circuit that is connected with described a plurality of termination circuit is used for extracting predetermined byte in described a plurality of first expenses;
A cross over circuit is used for the byte interconnection by described extraction circuit output;
One produces circuit, is used to produce one second expense, and this second expense comprises a plurality of operation informations that administer and maintain of waiting to export to far-end communications device, and described second expense comprises the output of described cross over circuit; With
A transtation mission circuit is used for comprising that second pay(useful) load and described second expense of an output of described multiplexed translation circuit send as described second transmission frame.
4. according to the multiplex transmission apparatus of claim 3, also comprise:
One is inserted circuit, is used for an output of described cross over circuit is inserted in the precalculated position of described second expense.
5. multiplex transmission apparatus, be used to receive first transmission frame, this transmission frame have a plurality of multiplexed therein signals, for described multiplex signal carry out that multichannel is decomposed and interconnection is handled, the signal of multiplexed processing and export described second transmission frame in a plurality of secondary signal transmission frames after this, it is characterized in that described transmitting device comprises:
A receiving circuit is used to receive first transmission frame, and this transmission frame comprises first pay(useful) load that contains a plurality of main signals and contains a plurality of first expenses that administer and maintain operation information;
A termination circuit is used for described first expense of termination;
A multichannel decomposition transform circuit is used for multichannel decomposition or interconnection and the corresponding described main signal of a plurality of outputs;
An extraction circuit that is connected with described termination circuit is used for extracting predetermined byte in described first expense;
A cross over circuit is used for the byte interconnection by described extraction circuit output;
A plurality of generation circuit, each produces circuit and is used to produce one second expense, and this second expense comprises a plurality of operation informations that administer and maintain of waiting to export to a far-end communications device, and described second expense comprises an output of described cross over circuit; With
A plurality of transtation mission circuits, each transtation mission circuit are used for comprising that second pay(useful) load and described second expense of an output of described multichannel decomposition transform circuit send as described second transmission frame.
6. according to the multiplex transmission apparatus of claim 5, also comprise:
One is inserted circuit, is used for an output of described cross over circuit is inserted in the precalculated position in each second expenses of described a plurality of second expenses.
7. multiplex transmission apparatus, be used to receive first multiplex signal, this multiplex signal comprises that one has therein by first pay(useful) load of multiplexed a plurality of main signals and first expense that comprises a plurality of first maintenance informations relevant with administering and maintaining operation, described first maintenance information is terminated handles and the main signal in described first pay(useful) load is carried out transmission process, after this described first multiplex signal is transformed into one second multiplex signal, this second multiplex signal comprises one second pay(useful) load and second overhead byte, described second pay(useful) load has multiplexed therein described main signal, this main signal has been treated for transmission, wherein said second overhead byte comprises a plurality of second maintenance informations relevant with administering and maintaining operation, described second maintenance information waits to export to a far-end communications device, with described second multiplex signal of transmission, it is characterized in that described transmitting device comprises:
One is extracted circuit, is used for extracting scheduled maintenance information from described first maintenance information;
A cross over circuit is used for the information of interconnection by described extraction circuit extraction; With
Insert circuit arrangement, be used for an output of described cross over circuit is inserted into a precalculated position of described second overhead byte;
Maintenance information predetermined in wherein said first multiplex signal is transferred to described second multiplex signal.
8. multiplex transmission apparatus, be used for receiving first multiplex signal from a plurality of first transmission lines, each multiplex signal comprises that one has therein by first pay(useful) load of multiplexed a plurality of main signals and first expense that comprises a plurality of first maintenance informations relevant with administering and maintaining operation, described a plurality of first maintenance informations are terminated handle and in one second pay(useful) load, carry out the multiplexed of described a plurality of first pay(useful) loads, with described first multiplex signal is transformed into one second multiplex signal, this second multiplex signal comprises second overhead byte and described second pay(useful) load that is added on described second overhead byte, described second overhead byte comprises a plurality of second maintenance informations relevant with administering and maintaining operation, described second maintenance information waits to export to a far-end communications device, with described second multiplex signal is sent on one second transmission line, it is characterized in that described transmitting device comprises:
One is extracted circuit, is used for extracting scheduled maintenance information from described a plurality of first maintenance informations;
A cross over circuit is used for the information of interconnection by described extraction circuit extraction;
One is inserted circuit, is used for an output of described cross over circuit is inserted into the precalculated position of described second overhead byte;
Wherein the described predetermined maintenance information that transmits by described first transmission line is transferred on described second transmission line.
9. multiplex transmission apparatus, be used for receiving one first multiplex signal from one first transmission line, this multiplex signal comprises that one has therein by first pay(useful) load of multiplexed a plurality of main signals and first expense that comprises a plurality of first maintenance informations relevant with administering and maintaining operation, described first maintenance information is terminated handles and the described first pay(useful) load multichannel is decomposed into a plurality of second pay(useful) loads, with described first multiplex signal is transformed into a plurality of second multiplex signals, each second multiplex signal comprises one second pay(useful) load in second pay(useful) load that a plurality of second overhead bytes and described multichannel decompose, described second overhead byte comprises a plurality of second maintenance informations relevant with administering and maintaining operation, described second maintenance information is exported to far-end communications device, with described a plurality of second multiplex signals are sent on a plurality of second transmission lines, it is characterized in that described transmitting device comprises:
One is extracted circuit, is used for extracting scheduled maintenance information from described a plurality of first maintenance informations;
A cross over circuit is used for the information of interconnection by described extraction circuit extraction;
One is inserted circuit, is used for the output of described cross over circuit is inserted into each precalculated position of described a plurality of second overhead bytes;
Wherein the described predetermined maintenance information that transmits by described first transmission line is transferred on described a plurality of second transmission line.
10. according to the multiplex transmission apparatus of claim 1, the described expense that it is characterized in that being included in described first transmission frame comprises section overhead and line expense, these expenses are by G.707 number suggestion or by the American National Standards Institute T.105 section overhead and the line expense of number standard definition of International Telecommunications Union, the described maintenance information of coming from described first transmission frame is inserted into the line expense of described second transmission frame on the precalculated position with described multiplex transmission apparatus, and transmits described second transmission frame.
11. multiplex transmission apparatus according to claim 1, it is characterized in that described maintenance information waiting for transmission is the maintenance information of selecting from E byte, F byte, D byte, K byte, Z byte, these bytes are by G.707 number suggestion or by American National Standards Institute's maintenance information of number standard definition T.105 of International Telecommunications Union.
12. multiplex transmission apparatus according to claim 9, it is characterized in that an expense that is added on each described multiplex signal comprises section overhead and line expense, these expenses be by International Telecommunications Union G.707 number suggestion or by American National Standards Institute T.105 the section overhead of number standard definition and line expense and described multiplex transmission apparatus are inserted into the maintenance information in the line expense that is included in described first transmission frame on a section overhead or a preposition in the line expense of described second demultiplex signal.
13. multiplex transmission apparatus, be used to connect first transmission frame, this transmission frame have a plurality of therein by multiplexed signal, for described multiplex signal carry out that multichannel is decomposed and interconnection is handled, the signal of multiplexed processing and export described second transmission frame in one second transmission frame after this, it is characterized in that described transmitting device comprises:
A receiving circuit is used to receive first transmission frame, and this transmission frame comprises first pay(useful) load that contains a plurality of main signals and contains a plurality of first expenses that administer and maintain operation information;
A termination circuit is used for described first expense of termination;
A treatment circuit is used for multiplexed/multichannel and decomposes or the described main signal of interconnection;
An amount of error treatment circuit is used for receiving the quantity of the transmission line mistake that described first transmission frame that comes from described termination circuit produces, so that handle the quantity of described error of transmission;
One produces circuit, is used to produce one second expense, and this second expense comprises a plurality of operation informations that administer and maintain of waiting to export to far-end communications device, and described second expense comprises an output of described amount of error treatment circuit; With
A transtation mission circuit is used for comprising that second pay(useful) load and described second expense of an output of described treatment circuit send as described second transmission frame.
14., it is characterized in that described amount of error treatment circuit comprises according to the multiplex transmission apparatus of claim 13:
An add circuit is used for the quantity addition of the quantity of the described first transmission line mistake that receives with second error of transmission that is detected by described termination circuit; With
A transtation mission circuit is used for an output of described add circuit is sent to described generation circuit.
15., it is characterized in that described amount of error treatment circuit comprises according to the multiplex transmission apparatus of claim 13:
An add circuit is used for the quantity addition of the quantity of the described first transmission line mistake that receives with second error of transmission that is detected by described termination circuit; With
Transtation mission circuit or one insert circuit, are used for the quantity from the mistake of described add circuit output is added to by described generation circuit newly being added on the error-detecting code on described second transmission frame and being used to send described second transmission frame.
16. multiplex transmission apparatus according to claim 13, it is characterized in that the relevant information of transmission line mistake that the information about described transmission line mistake to be transmitted and to be received is and is handled by B2 byte or B3 byte, wherein B2 byte or B3 byte are by G.707 number suggestion or by American National Standards Institute's byte of number standard definition T.105 of International Telecommunications Union.
17. multiplex transmission apparatus, be used for receiving one first multiplex signal from one first transmission line, this multiplex signal comprises that one has therein by first pay(useful) load of multiplexed a plurality of main signals and an expense that comprises a plurality of first maintenance informations relevant with administering and maintaining operation, described maintenance information is terminated handles and the described main signal in described pay(useful) load is carried out transmission process, after this described first multiplex signal is transformed into one second multiplex signal, this second multiplex signal comprises second pay(useful) load and overhead byte, described second pay(useful) load has multiplexed therein described main signal, this main signal has been treated for transmission, wherein said overhead byte comprises a plurality of second maintenance informations relevant with administering and maintaining operation, with described second multiplex signal is sent on one second transmission line, it is characterized in that:
Described multiplex transmission apparatus detects and produce wrong quantity on described first transmission line, be inserted into the quantity of the mistake of described generation in the overhead byte in described second multiplex signal and handle is transferred on described second transmission line in the quantity of the error of transmission that produces on described first transmission line.
18., it is characterized in that described transmitting device comprises according to the multiplex transmission apparatus of claim 17:
One is extracted circuit, is used to extract the quantity of described transmission line mistake;
A testing circuit is used to detect the quantity of the transmission line mistake on described first transmission line of described multiplex transmission apparatus;
An add circuit is used for the quantity addition of the transmission line mistake of the quantity of the transmission line mistake of described extraction and detection; With
Transmission line mistake transtation mission circuit is used for the output of described add circuit is inserted in the overhead byte of described second multiplex signal.
19., it is characterized in that described transmitting device comprises according to the multiplex transmission apparatus of claim 17:
One is extracted circuit, is used to extract the quantity of described transmission line mistake;
A testing circuit is used to detect the quantity of the transmission line mistake of described multiplex transmission apparatus on described first transmission line;
An add circuit is used for the quantity addition of the transmission line mistake of the quantity of the transmission line mistake of described extraction and detection; With
A transmission line mistake transtation mission circuit, be used in advance the quantity from the error of transmission of described add circuit output is added to the error detection signal that is used for the far-end transmitting device, described error detection signal newly is transmitted by described second transmission line and is used to transmit described error detection signal.
20. a multiplex transmission networks is characterized in that described transmission network comprises:
Plurality of transmission lines, every transmission lines is used to transmit transmission frame, and each transmission frame has a plurality of therein by multiplexed signal; With
A plurality of multiplex transmission apparatus, each transmitting device are used for receiving the described transmission frame that comes from arbitrary described transmission line, carry out transmission process and at the signal of the described processing of transmission frame transmission, wherein for described multiplex signal:
Described transmission frame comprise have therein by the pay(useful) load of multiplexed a plurality of main signals and comprise a plurality of expenses that administer and maintain information and
Each described multiplex transmission apparatus comprises:
A receiving circuit is used to receive described transmission frame;
A termination circuit is used for the described expense of termination;
A transmission process circuit is used for multiplexed/multichannel decomposition or the interconnection described main signal in described pay(useful) load;
An extraction circuit that is connected with described termination circuit is used for extracting predetermined byte in the expense of described reception;
A cross over circuit is used for the byte interconnection by described extraction circuit output;
One produces circuit, is used to produce an expense, and this expense comprises a plurality of operation informations that administer and maintain of waiting to export to far-end communications device, and described expense comprises the output of described cross over circuit; With
A transtation mission circuit is used for sending as transmission frame the pay(useful) load of the output that comprises described transmission process circuit with by the expense of described generation circuit output.
21. multiplex transmission networks according to claim 20, it is characterized in that described a plurality of multiplex transmission apparatus couples together through described transmission line, and by sending and receive described scheduled maintenance information transmitting scheduled maintenance information between the multiplex transmission apparatus arbitrarily.
22. the multiplex transmission networks according to claim 20 also comprises:
The amount of error treatment circuit, be used for being received in the quantity of the transmission line mistake that the described transmission frame that comes from described termination circuit produced, so that handle the quantity of described transmission line mistake, wherein, the described expense of described generation circuit output comprises an output of described amount of error treatment circuit.
23. multiplex transmission networks according to claim 22, the described amount of error treatment circuit that it is characterized in that described multiplex transmission apparatus comprises: an add circuit is used for the quantity addition of the quantity of the first transmission line mistake that receives with the second transmission line mistake that is detected by described termination circuit; With a transtation mission circuit, be used for an output of described add circuit is sent to described generation circuit.
24. multiplex transmission networks according to claim 22, the described amount of error treatment circuit that it is characterized in that described multiplex transmission apparatus comprises: an add circuit is used for the quantity addition of the quantity of the first transmission line mistake that receives with the second transmission line mistake that is detected by described termination circuit; Insert circuit with a transtation mission circuit or one, be used for the quantity from the mistake of described add circuit output is added to by described generation circuit and newly be added on the error-detecting code on the transmission frame and be used to send described transmission frame.
25. a multiplex transmission networks, described transmission network comprises:
Plurality of transmission lines, every transmission lines is used to transmit multiplex signal, this multiplex signal comprises a pay(useful) load and some overhead bytes, described pay(useful) load has therein by multiplexed a plurality of main signals, and described overhead byte comprises a plurality of maintenance informations relevant with administering and maintaining operation; With
A plurality of multiplex transmission apparatus, each transmitting device is used to receive from the next described multiplex signal of arbitrary described transmission line, be terminated for described maintenance information and handle and carry out transmission process for the described main signal in described pay(useful) load, described multiplex signal is transformed into different multiplex signals, this different multiplex signal comprises pay(useful) load and some overhead bytes, described pay(useful) load comprises the described described main signal that has been treated for transmission, described overhead byte comprises a plurality of different maintenance information relevant with administering and maintaining operation that is added on the described expense, with described different multiplex signal is sent to another transmission lines, it is characterized in that:
Described a plurality of multiplex transmission apparatus is first multiplex transmission apparatus, this first multiplex transmission apparatus comprises a testing circuit, be used to detect the quantity of the mistake on a transmission lines of receiver side, with an amount of error treatment circuit, be used for the quantity of the mistake of described generation is inserted in the overhead byte of the described multiplex signal on being output to a transmission lines of transmitter side, described first multiplex transmission apparatus is transferred to the quantity of the described transmission line mistake that produces on the transmission line of transmitter side on the described transmission line of receiver side; Or
Second multiplex transmission apparatus, this second multiplex transmission apparatus comprises: one is extracted circuit, be used to extract the quantity of the transmission line mistake of described transfer, a testing circuit, be used to detect the quantity of the transmission line mistake on the transmission line of receiver side, an add circuit, be used for output addition the output of described extraction circuit and described testing circuit, with a transtation mission circuit, be used in advance the quantity of the transmission line mistake of being exported by described add circuit being added to an error detection signal that is used for a far-end transmitting device, with be used for described error detection signal be sent to transmitter side transmission line and
Described multiplex transmission networks is notified the transmission line mistake that produces between the multiplex transmission apparatus arbitrarily by multiple transmitting device of described first and second multichannels and plurality of transmission lines.
26. multiplex transmission networks according to claim 25, it is characterized in that described transmission network also comprises: as the 3rd multiplex transmission apparatus of described multiplex transmission apparatus, the 3rd multiplex transmission apparatus comprises: one is extracted circuit, be used to extract the quantity of the transmission line mistake of described transfer, a testing circuit, be used to detect the quantity of the transmission line mistake on the transmission line of receiver side, an add circuit, be used for an output addition the output of described extraction circuit and described testing circuit, with the transtation mission circuit device, be used for the output of described add circuit is transferred to the transmission line of transmitter side
Wherein in the quantity of notifying in the described multiplex transmission networks that comprises described the 3rd multiplex transmission apparatus between described first and second multiplex transmission apparatus in the transmission line mistake that produces between the multiplex transmission apparatus arbitrarily.
27. multiplex transmission networks according to claim 25, described transmission network also comprises: the 3rd multiplex transmission apparatus as described multiplex transmission apparatus, the 3rd multiplex transmission apparatus comprises: one is extracted circuit, be used to extract the quantity of the transmission line mistake of described transfer, with a transtation mission circuit, be used to transmit a transmission line that outputs to transmitter side of described extraction circuit, wherein said the 3rd multiplex transmission apparatus is between described first and second multiplex transmission apparatus, and described multiplex transmission networks is notified the transmission line mistake that produces between the multiplex transmission apparatus arbitrarily in the described multiplexing net.
28. multiplex transmission networks according to claim 27, it is characterized in that the corresponding information of transmission line mistake that information about the described transmission line mistake notified between described multiplex transmission apparatus is and is handled by B2 byte or B3 byte, wherein B2 byte or B3 byte are by G.707 number suggestion or by American National Standards Institute's byte of number standard definition T.105 of International Telecommunications Union.
29. signal processing method that is used for multiplex transmission apparatus, this multiplex transmission apparatus is used to receive first transmission frame, this transmission frame have a plurality of therein by multiplexed signal, for described multiplex signal carry out that multichannel is decomposed and interconnection is handled, the signal of multiplexed described processing in second transmission frame and export described second transmission frame, it is characterized in that described method comprises step:
Receive one first transmission frame, this transmission frame comprises having therein by first pay(useful) load of multiplexed a plurality of main signals and first overhead byte that comprises a plurality of first maintenance informations relevant with administering and maintaining operation;
Described first overhead byte of termination;
Carrying out multiplexed/multichannel decomposition or interconnection for the described main signal in described first pay(useful) load handles;
From described first overhead byte, select predetermined described first maintenance information;
First maintenance information of the described selection of interconnection; With
Produce second overhead byte, this second overhead byte comprises with administering and maintaining relevant the waiting of operation exports to a plurality of second maintenance informations of another multiplexed transmission line, and described second overhead byte comprises described cross-coupled information.
30. signal processing method that is used for multiplex transmission apparatus according to claim 29, the step of wherein said generation second overhead byte comprises first maintenance information insertion wherein the step of position in order to will describedly selecting of selecting in described second overhead byte, and described multiplex transmission apparatus sends the scheduled maintenance information from described first maintenance information.
31. a method of operating multiplex transmission networks, this transmission network comprises:
Plurality of transmission lines, every transmission lines is used to transmit a multiplex signal, this multiplex signal comprises a pay(useful) load and some overhead bytes, described pay(useful) load has therein by multiplexed a plurality of main signals, and described overhead byte comprises a plurality of maintenance informations relevant with administering and maintaining operation; With
A plurality of multiplex transmission apparatus, each transmitting device is used to receive from the next described multiplex signal of arbitrary described transmission line, be terminated for described maintenance information and handle and carry out transmission process for the described main signal in described pay(useful) load, after this described multiplex signal is transformed into different multiplex signals, this different multiplex signal comprises pay(useful) load and some overhead bytes, described pay(useful) load comprises the described main signal that has been treated for transmission, described overhead byte comprises and connects a plurality of different maintenance information that operation is correlated with that administers and maintains that is added in the described pay(useful) load, with described different multiplex signal is sent on another transmission lines, it is characterized in that described method comprises step:
Multiplex transmission apparatus and the selection selecting to transmit and receive described maintenance information from described a plurality of multiplex transmission apparatus are transmitted the multiplex transmission apparatus of described maintenance information by it;
Select scheduled maintenance information waiting for transmission as the transmitter side multiplex signal in the described maintenance information of the receiver side multiplex signal from the multiplex transmission apparatus of described selection;
Extract the maintenance information of selecting in the overhead byte of the described reception from the multiplex transmission apparatus of described selection;
The maintenance information interconnection of the described extraction in the multiplex transmission apparatus of described selection; And
Selection is used for described cross-coupled maintenance information is inserted into a position of the described overhead byte of described multiplex signal waiting for transmission, described cross-coupled maintenance information is inserted in the described position, with described multiplex signal is transferred on the transmission line
Wherein by transmit maintenance information arbitrarily at any intermediary's multiplexer between the multiplex transmission apparatus so that make described any multiplex transmission apparatus can send and be received in maintenance information arbitrarily between them.
Applications Claiming Priority (3)
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| JP13801196A JP3663253B2 (en) | 1996-05-31 | 1996-05-31 | Multiplex transmission equipment |
| JP138011/96 | 1996-05-31 | ||
| JP138011/1996 | 1996-05-31 |
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| CN1173770A CN1173770A (en) | 1998-02-18 |
| CN1135757C true CN1135757C (en) | 2004-01-21 |
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| CNB971148686A Expired - Fee Related CN1135757C (en) | 1996-05-31 | 1997-05-31 | Multiplex transmission apparatus, multiplex transmission networks, and operation method therefor |
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| JP (1) | JP3663253B2 (en) |
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| JP3663253B2 (en) * | 1996-05-31 | 2005-06-22 | 株式会社日立コミュニケーションテクノロジー | Multiplex transmission equipment |
| US7643500B1 (en) * | 1996-10-22 | 2010-01-05 | Sprint Communications Company L.P. | Overhead replication for SONET signals |
| US7301953B1 (en) * | 1996-10-22 | 2007-11-27 | Sprint Communications Company L.P. | Method and system for transporting a secondary communication signal with a primary communication signal |
| IT1301719B1 (en) * | 1998-06-16 | 2000-07-07 | Alsthom Cge Alkatel | METHOD AND DEVICE TO IMPROVE FLEXIBILITY AND TRANSPARENCY IN THE TRANSPORT OF HIGH SPEED WEFT IN THE KNOTS OF A NETWORK AT |
| US6895018B1 (en) * | 1998-07-28 | 2005-05-17 | Nortel Networks Limited | Method and system for improved sonet data communications channel |
| US6757243B1 (en) * | 1998-12-29 | 2004-06-29 | At&T Corp. | System and method for service independent data routing |
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-
1997
- 1997-05-22 TW TW086106908A patent/TW339487B/en not_active IP Right Cessation
- 1997-05-27 US US08/863,675 patent/US6169754B1/en not_active Expired - Fee Related
- 1997-05-31 CN CNB971148686A patent/CN1135757C/en not_active Expired - Fee Related
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2000
- 2000-12-06 US US09/731,424 patent/US6697386B2/en not_active Expired - Fee Related
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2003
- 2003-12-03 US US10/728,260 patent/US7386012B2/en not_active Expired - Fee Related
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|---|---|
| US20010001002A1 (en) | 2001-05-10 |
| US20040165618A1 (en) | 2004-08-26 |
| JP3663253B2 (en) | 2005-06-22 |
| JPH09321729A (en) | 1997-12-12 |
| US7386012B2 (en) | 2008-06-10 |
| TW339487B (en) | 1998-09-01 |
| US6169754B1 (en) | 2001-01-02 |
| US6697386B2 (en) | 2004-02-24 |
| CN1173770A (en) | 1998-02-18 |
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